Power Supply too weak?

[Ie0n]

I have a 530 watt Power supply from Be Quiet, a GTX 780 and an FX-8350. If I run Prime 95 and Valley together my 12v rail drops to 11,5v, but after disabling dynamic frequency on my CPU and GPU in the BIOS, my Pc crashed after trying to stresstest again. Also, I never got a single mhz of overclock on my CPU, my 1600 ram only runs at 1333 and trying to get a slightly higher clock on my 780 resulted in tons of artifacts.

Is it overheating of my ultra silent power supply, that shitty Sabertooth R 2.0 or do I need moar watts?

[Swndlr]

i would get a new psu

[SirNumbers]

On paper that should be enough wattage, but those are all symptoms of not a good PSU so i'd get a new one. http://amzn.to/1v6vP8i Anything from here above 500w should be perfect